US3070974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single valve refrigeration control
Assignee: Garrett Corp
•
Filing: 1959-12-14
•
Granted: 1963-01-01
•
Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 Harold A Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F16; F16K; F16K11/00; F16K11/10; F16K11/12; F25B41/00; F25B41/20; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86558; Y10T137/86566; Y10T137/86863; Y10T137/86871; Y10T137/87153; Y10T137/87161; Y10T137/87917; Y10T137/88022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A CLOSED CYCLE REFRIGERATION SYSTEM HAVING A CENTRIFUGAL COMPRESSOR, A CONDENSER AND AN EVAPORATOR, MEANS FOR EFFECTING RELATIVELY CONTINUOUS OPERATION OF SAID COMPRESSOR, AND MODULATING MEANS FOR SAID SYSTEM COMPRISING: A VALVE ON THE DOWNSTREAM SIDE OF THE CONDENSER FOR CONTROLLING FLOW OF REFRIGERANT FLUID TO THE EVAPORATOR, TEMPERATURE RESPONSIVE MEANS CONTROLLING THE POSITION OF SAID VALVE, MEANS BY-PASSING THE CONDENSER TO FEED HOT COMPRESSED GAS TO SAID VALVE, MEANS FEEDING SAID GAS FROM SAID VALVE TO THE LOW PRESSURE SIDE OF THE SYSTEM WHEREIN HOT COMPRESSED GAS AND REFRIGERANT FLUID ARE NOT COMMINGLED WITHIN SAID VALVE MEANS WITHIN SAID VALVE FOR EXPANDING SAID REFRIGERANT FLUID, AND MEANS IN SAID VALVE GOVERNED BY THE POSITION THEREOF FOR DETERMINING THE RELATIVE PROPORTIONS OF REFRIGERANT LIQUID AND GAS FED THROUGH THE VALVE.
Claim 2
Dependent Claim
131 words
IN A CLOSED CYCLE REFRIGERATION SYSTEM HAVING A CENTRIFUGAL COMPRESSOR, A CONDENSER AND AN EVAPORATOR, MEANS FOR EFFECTING RELATIVELY CONTINUOUS OPERATION OF SAID COMPRESSOR, AND MODULATING MEANS FOR SAID SYSTEM COMPRISING: A VALVE ON THE DOWNSTREAM SIDE OF THE CONDENSER FOR CONTROLLING FLOW OF REFRIGERANT FLUID TO THE EVAPORATOR, TEMPERATURE RESPONSIVE MEANS CONTROLLING THE POSITION OF SAID VALVE, MEANS BY-PASSING THE CONDENSER TO FEED HOT COMPRESSED GAS TO SAID VALVE, MEANS FEEDING SAID GAS FROM SAID VALVE TO THE LOW PRESSURE SIDE OF THE SYSTEM WHEREIN HOT COMPRESSED GAS AND REFRIGERANT FLUID ARE NOT COMMINGLED WITHIN SAID VALVE MEANS WITHIN SAID VALVE FOR EXPANDING SAID REFRIGERANT FLUID, AND MEANS IN SAID VALVE GOVERNED BY THE POSITION THEREOF FOR DETERMINING THE RELATIVE PROPORTIONS OF REFRIGERANT LIQUID AND GAS FED THROUGH THE VALVE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |